© Magna-Plas Pty Ltd. E: info@magnaplas.com P: 03 5979 4222 F: 03 5979 4112 Magna-Plas Boat Rollers: Various Bore Sizes Available... Dog Bone Rollers: 4” 6” 8” 12” Available... Vee Rollers: 4” 6” 8” 12” Available... Cotton Reel Rollers: 4” 4.5” 6” 8” 12” Available... Concave Rollers: 6” 8” 12” Available... Parallel Rollers:  6” 8” 12” Available... Magna-Plas Boat Rollers: Magna-Plas Marine Trailer products are made out of Polyethylene, to replace rubber and PVC rollers that need constant replacement. Their long life makes them more economical in the long term, saving you time and money, and avoids damage to your boat & trailer. Magna-Plas Rollers and Marine products will make launching your boat a breeze!!! Buy Online Today!!!